A power supply is a critical component in a computer, and using an unreliable or low-quality power supply can lead to stability issues, component damage, and even safety hazards. It's highly advisable to invest in a power supply unit (PSU) from a reputable brand known for producing reliable and safe power supplies. When selecting a power supply for your computer, consider brands like Corsair, EVGA, Seasonic, Thermaltake, Antec, and other well-established manufacturers. These companies typically offer power supplies that meet industry standards for efficiency, safety, and performance. Additionally, they often come with warranties to provide peace of mind for your PC build.